Linux Text processing tools sed exercises

1. Use the SED command to print out the IP address of the ifconfig ens33

Solution: (1) ifconfig Ens33 | Sed-n ' 2p ' | Sed ' s/.*inet//' | Sed ' s/netmask.*//'

(2) Ifconfig Ens33 | Sed-n ' 2p ' | Sed-r ' s/.*inet (. *) netmask.*/\1/'

(3) Ifconfig Ens33 | Sed-r-N ' 2s/.*inet (. *) netmask.*/\1/p '

2. Use the SED command to print out the system version

Solution: Sed-r-N ' s/.*release[[:space:]]* ([^.] +). */\1/p '/etc/centos-release

3, script title: Use SED to determine the version number if the version number is 7 in/etc/default/grub grub_cmdlinux_linux= "RHGB quiet" after the addition of xxxxx characters, if not exit does not execute

Solution: vim/root/bin/test/sedtest.sh

#!/bin/bash

banben= ' Sed-nr ' s/.*release[[:space:]]* ([^.] +). */\1/p '/etc/centos-release '

["$banben"-eq 7] && Sed-nr-i.bak ' s/(. *linux= ". *)"/\1 xxxxxxxx "/P '/etc/default/grub | | Exit 20

The additional section can also be used in this way: Sed-r ' s/quiet/& xxxx/'/etc/default/grub (the & symbol in the sentence represents all the preceding characters)

4. Use SED to remove the base name and directory name from the/etc/sysconfig/network-scripts/

Solution: echo/etc/sysconfig/network-scripts/| Sed-nr ' s#.*/(. +)/?#\1#p ' Take the base name

echo/etc/sysconfig/network-scripts/| Sed-nr ' s# (. *) (. +)/?#\1#p ' Fetch folder name

echo/etc/sysconfig/network-scripts/| Sed-nr ' s# (. *) (. +)/?#\2#p ' Take the base name

5, using SED will/etc/httpd/conf/httpd.conf #namevirtualhost *:80 Remove the # number, while the last 7 lines of # are removed

Solution: Sed-e ' s/#Name/name/'-e '/#<virtualhost/,/#<\/virtual/s/#//'/etc/httpd/conf/httpd.conf

Linux Text processing tools sed exercises